Set the alarm clock for 4:25 am

 

Leave this tab open — the alarm only rings while the tab stays open.

The alarm goes off in: ::
 
 

Going to bed for a 4:25 am alarm

  • Asleep by 7:10 pm — 6 full sleep cycles, about 9 hours
  • Asleep by 8:40 pm — 5 full sleep cycles, about 7 hours
  • Asleep by 10:10 pm — 4 full sleep cycles, about 6 hours

A sleep cycle runs about 90 minutes, and most people take around 15 minutes to drop off. Waking at the end of a cycle feels easier than waking in the middle of one.

4:25 am across the country

London4:25 am
Birmingham4:25 am
Manchester4:25 am
Glasgow4:25 am
Belfast4:25 am

Times are worked out live in your browser, so daylight saving is already accounted for.

How to use the online alarm clock

Waking at 4:25 am for a night delivery at the pub means getting your bearings before anything else has begun. There is time to dress, check which entrance the driver will use and find the keys without rushing into the dark. By 5:00 am, you can be downstairs and ready to receive the delivery rather than searching for the right door when the van arrives.

A delivery van idling outside, refrigeration equipment or noise from the street can easily cover a quiet alarm. The selected sound needs enough volume to remain noticeable from where the phone is left, so checking it against the pub’s background noise beforehand is useful. This browser alarm cannot sound after its session has ended or the phone has fallen asleep, which could leave the delivery waiting outside; keeping the session active and the phone awake avoids relying on a signal that cannot run.

Before the pub is opened for the delivery, the change from a dark room to a bright corridor can feel abrupt at this hour. A low lamp left within reach gives enough light to see the floor, keys and clothes at 4:25 am without switching on the main ceiling light. Curtains can stay partly closed until you are dressed, while an entrance light prepared earlier makes the driver’s arrival easier to handle safely.

Common questions

What happens if my laptop goes to sleep before 4:25 am?

The tab sleeps along with it and the alarm will not sound on time, if at all. If you are relying on it, change the power settings so the machine stays awake, or keep a phone alarm running as well.

Do I need an account or an app?

Neither. Choose a time and a sound, press Start, and it runs in this browser tab. Nothing is downloaded, nothing is registered, and closing the page leaves nothing behind on the device.

Can I change the sound?

Yes, there is a short list of tones to pick from before you press Start. Softer sounds are easy to sleep through, so a firmer bell tends to be the safer choice for anything early in the morning.

Will it still be right when the clocks change?

Yes. It reads your device's local clock, so the move between GMT and BST at the end of March and October is picked up automatically, as long as the computer's date, time and time zone are set correctly.